Flying object by flapping motion of wings equipped with compressed air engine

ABSTRACT

The present invention to a flying object by flapping motion of two pair of wings, which comprises a compressed air engine, a flying body (or compressed air container) assembled with the compressed air engine and in which compressed air is contained, two pair of wings symmetrically assembled with the compressed air engine and functioning flapping motion up and dawn in the range of 70° while the individual wing being able to get twisted in the range of 15°, a head cover for covering the front and upper part of the compressed air engine, and a tail wing with a horizontal wing and a vertical wing.

FIELD OF THE INVENTION

The present invention relates to a flying object in which compressed airis filled into a flying body, and a flying is realized by thedischarging force of the compressed air. More specifically, the presentinvention relates to a flying object in which compressed air is filledinto a flying body, and the compressed air is discharged at a certaindischarge rate to drive a compressed air engine so as to make two pairsof wings flapped, thereby producing a lifting force and a propulsiveforce, and making the flying object fly.

BACKGROUND OF THE INVENTION

Model planes are a kind of most popular sports articles for adults aswell as for children. So far, many kinds of model planes have beenmanufactured for being used as toys, as sports articles and asrecreation articles. The model planes that have been manufactured so farcan be classified into: those having no power-driving means; and thosehaving a power-driving means. The model planes that are provided withthe power-driving means include: propeller planes, jet planes, andhelicopters with helical wings. They are usually controlled with a radiocontroller.

The present inventors have been making efforts to get rid of theconception of the conventional model planes to develop a flying objectresorting to the flapping motions of wings like birds and insects.

OBJECT OF THE INVENTION

Therefore it is an object of the present invention to provide a flyingobject in which the flying body that functions a compressed aircontainer is filled with a compressed air, and the compressed air thusfilled is discharged at a certain discharge rate, thereby producing apropulsive force for the flying object.

It is another object of the present invention to provide a flying objectin which the compressed air is discharged at a certain discharge rate,so that a compressed air engine can produce flapping motions in thewings, thereby making the flying object fly.

It is still another object of the present invention to provide a flyingobject in which the flying body (the compressed air container), the twopairs of wings and a head cover can be assembled to the compressed airengine in a simple manner, so that the flying object can be convenientlyused.

It is still another object of the present invention to provide a flyingobject in which a portable pump is used to inject the compressed airinto the flying body so as to realize a flying.

It is still another object of the present invention to provide a flyingobject in which two pairs of wings perform flapping motions up and downto produce a propulsive force so as to realize a flying.

It is still another object of the present invention to provide a flyingobject in which the two pairs of wings perform the flapping motions inopposite directions, and the individual wings perform twisting motionswithin a range of 15° so as to realize the flying.

It is still another object of the present invention to provide a flyingobject in which a vertical tail wing of the flying body can be inposition adjusted to shift the flying to the desired direction.

The above objects and other objects can be achieved in all by thepresent invention as described in detail below.

SUMMARY OF THE INVENTION

In achieving the above objects, the flying object according to thepresent invention includes: a compressed air engine; a flying bodyassembled to the compressed air engine, for receiving a compressed air;two pairs of wings symmetrically assembled to left and right sides ofthe compressed air engine, for performing flapping motions up and downwithin an angular range of about 70° and twisting motions within a rangeof 15°; a head cover for covering a front part and an upper part of thecompressed air engine; and a tail wing.

The tail wing is assembled to a tail part of the flying body, and thevertical tail wing can be in position adjusted to shift the flyingdirection.

In the flying object of the present invention, air is compressedlyinjected into the flying body (compressed air container) to a certainlevel of pressure by using a portable pump; any one of the wings is hitto discharge the compressed air from the compressed air container at acertain discharge, rate; the discharged air drives the compressed airengine; and thus the two pairs of wings assembled to the compressed airengine are made to perform flapping motions in mutually oppositedirections up and down and to produce a lifting force and a propulsiveforce so as to realize a flying.

BRIEF DESCRIPTION OF THE DRAWINGS

The above objects and other advantages of the present invention willbecome more apparent by describing in detail the preferred embodiment ofthe present invention reference to the attached drawings in which:

FIG. 1 is a schematic perspective view of the dragon-fly-shaped flyingobject equipped with the compressed air engine according to the presentinvention;

FIG. 2 is a schematic perspective view of the compressed air engine 1according to the present invention;

FIG. 3 is a schematic exploded perspective view of the compressed airengine of FIG. 2;

FIG. 4 is a schematic exploded perspective view of an air injection part200;

FIG. 5A is a plan view of an air injection part body 201, FIG. 5B is abottom view of it, and FIG. 5C is a frontal view of it;

FIG. 6 is a schematic sectional view showing the principle by which thecompressed air is injected into the compressed air container 2, and thepistons 300 of the compressed air engine 1 are driven by the compressedair;

FIG. 7A is a schematic perspective view of the piston 301 a, FIG. 7B isan exploded perspective view of the piston with a rubber ring 306 aseparated off, FIG. 7C is a plan view of it, and FIG. 7D is a bottomview of it;

FIG. 8 is a schematic exploded perspective view of a flapping motionpart 400 of the compressed air engine;

FIG. 9A is a plan view of a reciprocating member 401 a, and FIG. 9B is aleft side view (or right side view) of it;

FIG. 10 is a schematic plan view showing the assembling of the two pairsof wings 3 a, 3 b, 4 a and 4 b to pins 412 a, 415 a, 412 b and 415 b ofthe flapping motion part 400;

FIG. 11 is a schematic exploded perspective view showing a state inwhich a front wing 3 a is sated from the pin 412 a of the reciprocatingmember 401 a;

FIG. 12 is a schematic exploded perspective view of the front wing 3 a;

FIG. 13 is a schematic exploded perspective view showing a state inwhich the rear wing 4 a is separated from the pin 412 b of thereciprocating member 40lb;

FIG. 14 is a schematic exploded perspective view of the rear wing 4 a;

FIG. 15A is a schematic plan view of a frame 42 of the rear wing 4 a,and FIG. 15B is a schematic plan view of a wing cloth 725 of the rearwing 4 a;

FIG. 16 is a schematic exploded perspective view of a tail wing 500which is separated from a flybody 2; and

FIG. 17 is a schematic plan view of the tail wing 500.

BEST EMBODIMENT OF CARRYING OUT THE INVENTION

The flying object according to the present invention is constituted asfollows. That is, a flying body (compressed air container) 2, a pair offront wings 3 a and 3 b and a pair of rear wings 4 a and 4 b areassembled to a compressed air engine 1. The compressed air that has beenfilled in the compressed air container is discharged to drive thecompressed air engine. The compressed air engine makes the front andrear wings perform flapping motions up and down in opposite directionswithin an angular range of about 70°, thereby producing the lifting andpropulsive forces, and realizing a fly.

A head cover 5 is not directly related to the function of the flyingobject of the present invention, but is provided for an aestheticpurpose. The head cover covers the front and upper parts of thecompressed air engine 1. FIG. I is a schematic perspective view of thedragon-fly-shaped flying object equipped with the compressed air engineaccording to the present invention. The flying object according to thepresent invention can be exploded into: the compressed air engine 1, theflying body 2, the two pairs of wings 3 a, 3 b, 4 a and 4 b, the headcover 5 and a tail wing 500. Further, these components can be assembledby a user in a simple manner.

FIG. 2 is a schematic perspective view of the compressed air engineaccording to the present invention. FIG. 3 is a schematic explodedperspective view of the compressed air engine of FIG. 2. The flying body2, the two pairs of wings 3 a, 3 b, 4 a and 4 b and the head cover 5 areassembled to the compressed air engine.

As shown in FIG. 3, the compressed air engine includes: an engine body100; an air injection part 200 assembled to the bottom of the enginebody 100, for injecting a compressed air; a set of pistons 300 insertedinto cylinders of the engine body, for performing up/down movements; anda flapping motion part 400 for performing up/down movements to make thewings 3 and 4 perform flapping motions.

FIG. 4 is a schematic exploded perspective view of the air injectionpart 200. The air injection part includes: an air injection part body201, an air injection means 202, and an air exit means 203. FIG. 5A is aplan view of an air injection part body 201, FIG. 5B is a bottom view ofit, and FIG. 5C is a frontal view of it.

The air injection part body 201 is assembled with the air injectionmeans 202 and the air exit means 203. The air injection means 202includes: a pump connector 222 with an air passage 223 and a dent 224formed therein; and a rubber bead 221 disposed at the dent 224. A hose(not illustrated) of an air pump (not illustrated) is connected to thepump connector 222, so that the compressed air can be injected into thecompressed air container.

When the compressed air is injected through the air injection means 202into the compressed air container, if the internal pressure of thecontainer exceeds a certain level, then the compressed air is dischargedthrough the air exit means 203. The air exit means serves as a kind ofsafety pin. As shown in FIG. 4, the air exit means 203 includes: an aircock 231 with an air passage 234 and the dent 235 formed therein; aspring 232 inserted into the dent 235; and a rubber button 233 forpressing the spring 232.

FIG. 6 is a schematic sectional view showing the principle by which thecompressed air is injected into the compressed air container 2, and thepistons 300 of the compressed air engine 1 are driven by the compressedair.

First, the air that has been compressed by the air pump passes throughthe air passage 223 to lift the rubber bead 221. Above the rubber bead221, there is formed a protrusion 212 in which a slit is formed.Therefore, the compressed air can pass through, but the rubber beadcannot pass through. Accordingly, the compressed air is filled into thecompressed air container. Thereafter, if the operation of the air pumpis halted, then the rubber bead 221 blocks the air passage 223, with theresult that the compressed air is not discharged to the outside.

In the case of the present invention, the internal pressure of thecompressed air is maintained at about 7 kgf/cm². However, the internalpressure is not limited to this pressure level. If the air pump isactivated to inject the compressed air into the compressed aircontainer, then rubber beads 112 a and 112 b of bead supports 11la and111 b move up to block the air passages, so that the compressed aircannot be discharged. Thus by continuously driving the air pump, thecompressed air container can be filled with the compressed air.

If the internal pressure of the compressed air container exceeds acertain level after continuously driving the air pump, then thecompressed air container can be ruptured, and therefore, a safety deviceis required. This safety device is the air exit means 203 that isinstalled in the air injection part 200. The air exit means is activatedonly when the internal pressure of the compressed air container exceedsa certain level. In order to make the compressed air discharged, thereis provided a hole 211 at the center of the air injection part body 201.

The compressed air that is tending to be discharged through the hole 211pushes the button 233, and the button in turn pushes the spring 232,with the result that the compressed air is discharged through the dent235 and the air passage 234 to the outside. If the compressed air isdischarged to a certain degree, the button is restored to the originalposition owing to the elasticity of the spring, with the result that thedischarge of the compressed air is stopped.

In the actual case, if the air exit means 203 is activated afterexcessively filling the compressed air, then the compressed air has tobe slightly refilled before carrying out the flying. This can be easilycarried out if one has tried the flying object several times.

The compressed air container is made of a synthetic resin, and the resinis not limited to a particular one, but preferably, polyester may beused. The inlet 21 of the compressed air container (flying body) isinserted into an outlet 101 of the engine body 100, and then, bolts 102are fastened into bolt holes 103 a, 21 a, 103 b and 21 b. As shown inFIG. 3, the outlet is slightly inclined up from the horizontal plane ofthe engine body.

Accordingly, the compressed air container is assembled to the enginebody in a slightly upwardly inclined form. The compressed air containershould be preferably assembled to the engine body at an inclinationangle of about 12 degrees. As to the bulk of the compressed aircontainer, it depends on the size of the engine and the size of thewings 3 and 4, but usually, if the volume is 300 ml, the flying objectcan fly about 20 seconds, while the flying distance is 80˜100 m.

If the compressed air is sufficiently filled in the compressed aircontainer, then the compressed air engine is activated. The activationof the engine can be carried out in a simple manner. That is, in orderto activate the engine, any one of the wings 3 a, 3 b, 4 a and 4 b hasonly to be hit upward or downward.

For example, if any one of the front wings 3 a and 3 b is lightly hitwith hand, then the reciprocating member 401 a descends to make thepiston 301 a descend. Then the spring 305 a of the piston momentarilypushes down the rubber bead l12 a, so that the compressed air can bedischarged. The discharged compressed air pushes up the piston 301 a,and the piston pushes up the reciprocating member. Thus if thereciprocating member is lifted up, then the front wings 3 a and 3 bperforms flapping motions.

If the reciprocating member 401 a ascends, then the reciprocating member401 b descends, and the piston 301 b also descends. Then the spring 305b pushes down the rubber bead 112 b, with the result that the compressedair is discharged. These motions are momentarily and repeatedly carriedout, so that the pistons 301 a and 301 b would move up and down in theopposite directions. Meanwhile, the rubber beads 112 a and 112 b areopened in a mutually opposite manner, and the reciprocating members 401a and 401 b move up and down in the mutually opposite directions.

As a result, the two pairs of the wines 3 a, 3 b, 4 a and 4 b, which arerespectively assembled to the reciprocating members 401 a and 401 b,perform the flapping motions. That is, if the pair of the front wings 3a and 3 b perform the flapping motion upward, the pair of the rear wings4 a and 4 b perform the flapping motion downward. These flapping motionsare done until the compressed air is completely discharged.

FIG. 7 is for clearly showing the up/down movements of the piston 301 a.FIG. 7A is a schematic perspective view of the piston 301 a, FIG. 7B isan exploded perspective view of the piston with a rubber ring 306 aseparated off, FIG. 7C is a plan view of it, and FIG. 7D is a bottomview of it;

As shown in FIG. 7, the piston 300 includes: a piston body 301; a disc303 formed integrally with the piston body; a rubber ring 306 fittedbetween the piston body and the disc; and a spring 305 assembled to thebottom of the disc. A plurality of axially directed grooves 302 areformed on the piston body and on the disc, and these grooves serve asair passages. Further, the disc is provided with a plurality of holes304 for serving as air passages.

During the time when the compressed air engine is in activation, thespring 305 a repeatedly pushes down the rubber bead 112 a. If the rubberbead 112 a is pushed down, the compressed air is discharged to passthrough the plurality of the holes 304 a of the disc 303 a. Thecompressed air which has passed through the holes 304 a pushes therubber ring 306 a to make the rubber ring 306 a closely contacted to theinside wall of the cylinder 104 a. Thus the compressed air pushes up thepiston 301 a, and in turn, the piston 301 a pushes up the reciprocatingmember 401 a.

If the reciprocating member 401 a ascends and the reciprocating member401 b descends, then the spring 305 b pushes the rubber bead 112 b, withthe result that the compressed air is discharged through the beadsupport 111 b. At the same time, the rubber bead 112 a moves up to theceiling of the bead support 111 a owing to the pressure of thecompressed air, thereby blocking the discharge of the compressed air.

If the rubber bead 112 a blocks the discharge of the compressed air,then the compressed air is discharged through the air outlet 106 a ofthe cylinder to the outside, and therefore, the rubber ring 306 a iscontracted. Meanwhile the compressed air that has been filled within thecylinder 104 a is discharged through the plurality of the grooves 302 ato the outside. These actuations occur in the opposite directions in thepiston 300 a and the piston 300 b.

FIG. 8 is a schematic exploded perspective view of a flapping motionpart 400 of the compressed air engine. In the flapping motion part, apair of reciprocating members 401 a and 401 b are assembled togetherthrough a lever 402. Thus, if the reciprocating member 401 a ascendswithin a shuttle 111 a, then the other reciprocating member 401 bdescends within a shuttle 110 b and around a hole 404 and a hole 120 ofthe engine body 100. During the time when the compressed air engine 1 isin operation, the above actuations are repeatedly carried out.

Thus the lever 402 is secured in such a manner that it can be rotatedaround a lever support 107 of the engine body. Further, the lever issecured in such a manner that a pin 403 is inserted through the hole 404of the lever 402 and through the hole 120. Further, the lever has slits421 and 422 on both ends of it, so that the reciprocating members 401 aand 401 b can be assembled to the slits 421 and 422.

As shown in FIG. 8, a hollow 414 b is formed within the reciprocatingmember 401 b, and a pin 413 b is formed on the reciprocating member 401b so as to be assembled into the slit 422. On the bottom of thereciprocating member 401, there is formed an extension 411 for beingcontacted to the top of the piston 300. FIG. 9A is a plan view of thereciprocating member 401 a, and FIG. 9B is its left side view (or rightside view). Each of the reciprocating members 401 has pins 415 and 412,so that the wings 3 and 4 can be assembled to them.

FIG. 10 is a schematic plan view showing the assembling of the two pairsof wings 3 a, 3 b, 4 a and 4 b to pins 412 a, 415 a, 412 b and 415 b ofthe flapping motion part 400. The wings 3 a, 3 b, 4 a and 4 b areassembled to the pins 412 a, 415 a, 412 b and 415 b by means of winglevers 31 a, 31 b, 41 a and 41 b.

FIG. 11 is a schematic exploded perspective view showing a state inwhich a front wing 3 a is separated from the pin 412 a of thereciprocating member 401 a. FIG. 12 is a schematic exploded perspectiveview of the front wing 3 a. The front wing is assembled to the pin 412 aof the reciprocating member 401 a by utilizing the wing lever 31. Thewing lever has a slit 35, and the pin 412 a is inserted into the slit35. Then a pin 109 a is made to pass through a hole 36 and a protrusion108 a, thereby coupling the wing 3 a to the engine body 100.

The wing 3 a is secured to the engine body 100 by the pin 109 a, and thereciprocating member 401 a moves up and down. As a result, the wing 3 aperforms the flapping motions. The flapping motions of the wing 3 a isdone within an angular range of about 70°, but those ordinarily skilledin the art will be able to easily change the angular range.

The wing lever 31 a is bent by a certain degree, so that the front wing3 a can avoid any contact with the rear wing 4 a when performing theflapping motions. Further, when the wing 3 a performs the flappingmotions, it also performs twisting motions within an angular range ofabout 15°. The wing 3 a is constituted such that a wing cloth 625 isattached on a wing frame 32, and the wing lever 31 a is inserted into ahole 621 of the wing frame 32.

Under this condition, the hole 621 has to have to sufficient diameter sothat the wing lever 31 a can be smoothly rotated. If the wing lever 31 ais inserted, then a clip 33 is inserted into holes 622 and 623, therebyassembling the wing lever 31 a. Assembling cocks 631 and 632 of the clip33 are fixedly secured on the holes 622 and 623 respectively.

However, the rectangular hole 38 of the wing lever 31 has to be largerthan the assembling cock 632. In other words, the wing lever has arectangular hole, so that when the wing 3 a is assembled to the winglever through the clip 33, the wing cloth 625 can perform the twistingmotions within a range of about 15° around the axis of the wing frame32.

FIG. 13 is a schematic exploded perspective view showing a state inwhich the rear wing 4 a is separated from the pin 412 b of thereciprocating member 401 b. FIG. 14 is a schematic exploded perspectiveview of the rear wing 4 a. The rear wing is assembled to a pin 412 b ofthe reciprocating member 401 b by utilizing a wing lever 41 b. The winglever has a slit 45 in which the pin 412 b is inserted.

Then a pin 47 is made to pass through a hole 46 and a protrrsion 108 b,thereby coupling the rear wing 4 a to the engine body 100. Thus the rearwing 4 a is secured to the engine body 100 by the pin 47, and thereciprocating member 401 b moves up and down. As a result, the wing 4 aperforms flapping motions. The angular range of the flapping motions isabout 70°, but this range can be easily changed by those ordinarilyskilled in the art.

The wing lever 41 a of the rear wing 4 a has a straight shape unlike thewing lever 31 a of the front wing 3 a. When the rear wing 4 a performsthe up/down flapping motions, it also performs twisting motions withinan angular range of about 150. The wing 4 a is constituted such that awing cloth 725 is attached on a wing frame 42, and the wing lever 41 ais inserted into a hole 721 of the wing frame 42. Under this condition,the hole 721 has to have a sufficient diameter so that the wing lever 41a can be smoothly rotated.

When the wing lever 41 a is inserted into the hole 721, the clip 43 isinserted into holes 722 and 723, thereby assembling the wing lever 41 a.That is, assembling cocks 731 and 732 are respectively inserted into theholes 722 and 723, and a rectangular hole 48 of the wing lever 41 a hasto be larger than the assembling cock 732. That is, the rectangular hole48 of the wing lever 41 a is formed such that when the wing 4 a isassembled to the wing lever 41 a by using the clip 43, the wing cloth725 can perform twisting motions within an angular range of about 15°around the axis of the wing frame 42.

FIG. 15A is a schematic plan view of a frame 42 of the rear wing 4 a,and FIG. 15B is a schematic plan view of a wing cloth 725 of the rearwing 4 a. The wing 4 a is formed by attaching the wing cloth 725 ontothe wing frame 42. The wing frame should be preferably made of asynthetic resin, while the wing cloth 725 should be preferably made of asynthetic resin or a fabric. In view of the air resistance, the surfaceof the wing cloth should be pockmarked, so that the surface area of thewing cloth can be maximized.

FIG. 16 is a schematic exploded perspective view of a tail wing 500which has been separated from a flying body 2, and FIG. 17 is aschematic plan view of the tail wing. The tail wing includes a verticalwing 501 and a horizontal wing 502. Further, the tail wing includes apair of assembling holes 504, so that the tail wing can be assembled tothe flying body. Meanwhile, the flying body has a pair of assemblingprotrusions 503 to be mated to the assembling holes 504.

On the rear portion of the vertical wing 501, there is formed anadjusting slit 505, so that the direction of the vertical wing can beadjusted. The vertical wing is made of a flexible material, and isinstalled leaving the adjusting slit, so that the piloting of the flyingobject can be carried out. For example, if the vertical wing is securedto the right side adjusting slit, then the flying object turns to theright during the flying.

In the above, the present invention was described based on the specificpreferred embodiments and the attached drawings, but it should beapparent to those ordinarily skilled in the art that various changes andmodifications can be added without departing from the spirit and scopeof the present invention, which will be defined in the appended claims.

What is claimed is:
 1. A flying object for flying by flapping motions ofwings, comprising: a compressed air engine; a flying body assembled tothe compressed air engine and with a compressed air filled therein; twopairs of wings symmetrically assembled to left and right sides of thecompressed air engine, for performing flapping motions up and downwithin an angular range of about 70°, a pair of the front wings movingup when a pair of the rear wings move down, and these actuations beingrepeatedly carried out; a head cover for covering a front part and anupper part of the compressed air engine; and a tail wing including avertical wing and a horizontal wing.
 2. The flying object as claimed inclaim 1, wherein the compressed air engine comprises: an engine body 100comprising: a pair of cylinders 104 a and 104 b for accommodating a pairof reciprocating pistons 300 a and 300 b; a pair of shuttles 110 a and110 b for accommodating reciprocating motions of a pair of reciprocatingmembers 401 a and 401 b; and an outlet 101 for assembling the flyingbody; an air injection part 200 assembled to a bottom of the flyingbody, for injecting the compressed air into the flying body, and fordischarging the compressed air from the flying body into the enginebody, and comprising: an air injection part body 201, an air injectionmeans 202, and an air exit means 203; a pair of pistons 300 forperforming up/down movements along the cylinders 104, and each of thepistons 300 comprising: a piston body 301; a disc 303 formed integrallywith the piston body; a rubber ring 306 fitted between the piston bodyand the disc; a spring 305 assembled to a bottom of the disc; aplurality of axially directed grooves 302 formed on the piston and onthe disc; and a plurality of through-holes 304 formed in the disc; and aflapping motion part 400 with the two pairs of the wings assembledthereon, and comprising: a pair of reciprocating members 401 a and 401b, and a lever 402, the lever 402 being assembled to the engine body,and the pair of the reciprocating members 401 a and 401 b performingup/down movements within the shuttles 110 a and 110 b in oppositedirections.
 3. The flying object as claimed in claim 2, wherein the airinjection means comprises: a pump connector 222 with an air passage 223and a dent 224 formed therein; and a rubber bead 221 disposed in thedent.
 4. The flying object as claimed in claim 2, wherein the air exitmeans comprises: an air cock 231 with an air passage 234 and a dent 235formed therein; a spring 232 inserted into the dent; and a button 233assembled upon the spring.
 5. The flying object as claimed in claim 2,wherein a pair of bead supports 111 a and 111 b are formed on a bottomof the engine body, for receiving rubber beads 112 a and 112 brespectively.
 6. The flying object as claimed in claim 2, wherein thelever has a pair of slits 421 and 422 on both end portions thereof, forreceiving the reciprocating members 401 a and 401 b respectively.
 7. Theflying object as claimed in claim 2, wherein the pair of the front wings3 a and 3 b are assembled by fitting the wing levers 31 a and 31 b topins 412 a and 415 a of the flapping motion part 400 respectively; andthe pair of the rear wings 41 a and 41 b are assembled by fitting thewing levers 41 a and 41 b to pins 412 b and 415 b of the flapping motionpart 400 respectively.
 8. The flying object as claimed in claim 7,wherein the wing levers 31 a and 31 b are bent to a certain degree so asto avoid any contact with the rear wings during the flapping motions. 9.The flying object as claimed in claim 7, wherein the two pairs of thewings 3 a, 3 b, 4 a and 4 b perform the flapping motions within anangular range of about 70°.
 10. The flying object as claimed in claim 7,wherein the wing levers 31 and 41 respectively have rectangular holes 38and 48, and the rectangular holes 38 and 48 have a size larger than thatof assembling cocks 631 and 731 so as to make the two pairs of the wings3 a, 3 b, 4 a and 4 b perform twisting motions within an angular rangeof about 15°.
 11. The flying object as claimed in claim 2, wherein eachof the wings 3 a, 3 b, 4 a and 4 b is formed by attaching a wing cloth625 on a wing frame.
 12. The flying object as claimed in claim 1,wherein the wing cloth 625 has a pockmarked surface so as to maximizeits surface area.
 13. The flying object as claimed in claim 1, whereinthe compressed air container (flying body) 2 is inclined by about 12degrees relative to a horizontal plane of the engine body.
 14. Theflying object as claimed in claim 1, wherein an adjusting slit 505 isformed so as to make it possible to adjust directions of the verticalwing, and the vertical wing is made of a flexible material.
 15. A methodfor flying a flying object by flapping motions of wings, whichcomprises: injecting compressed air into a flying body (compressed aircontainer) to a certain level of pressure by using a portable air pump;hitting any one of wings upwardly or downwardly to discharge thecompressed air from the compressed air container at a certain dischargerate; driving a compressed air engine with the discharged air; andperforming flapping motions by two pairs of wings assembled to thecompressed air engine in mutually opposite directions up and down toproduce a lifting force and a propulsive force so as to realize aflying.
 16. The method as claimed in claim 15, further comprising,during an injection of the compressed air, if the compressed aircontainer exceeds a certain level of pressure, discharging thecompressed air through an air exit means to outside.
 17. The method asclaimed in claim 15 wherein said flapping motions up and down areperformed within an angular range of about 70°, and said two pairs ofwings perform twisting motions within an angular range of about 15°. 18.The method as claimed in claim 15 wherein the flying direction of theflying object is adjusted by adjusting a posture of a vertical wing of atail wing.